Cisco Systems, Inc This specification proposes an update to IPv6 Neighbor Discovery, to enhance the operation of IPv6 over wireless links that exhibit lossy multicast support, and enable a large degree of scalability by splitting the broadcast domains. A broadcast-efficient backbone running classical IPv6 Neighbor Discovery federates multiple wireless links to form a large MultiLink Subnet, but the broadcast domain does not need to extend to the wireless links for the purpose of ND operation. Backbone Routers placed at the wireless edge of the backbone proxy the ND operation and route packets from/to registered nodes, and wireless nodes register or are proxy-registered to the Backbone Router to setup proxy services in a fashion that is essentially similar to a classical Layer-2 association.